Gage.



No. 817,492. PATENTED APR.10, 1906.

P. LMZMAN.`

GAGE.

APPLIOATION FILED MAR.18,1905.

www 5 rarita LAYMAN, or AKRON, oHIo.

S'pecicationlof Letters Patent.

GAGE.

Patented April 10, 1906.

Application filed March 18,1905. Serial No. 250.704.

To all whom it may concern:

Be it known that I, PETER LAYMAN, a citizen of the United States of America, residing at Akron, in the county of Summit and State of Ohio, have invented certain new and useful Improvements in Gages, of which the following isl a speciication, reference being had therein to the accompanying drawings. This invention has relationto gages, and relates more particularly to beam-gagesthat is, to gages in Which two heads are mounted upon a beam, onejof the heads being usually adjustable and preferably formed with a micrometer, whereby minute measurernents may be secured. Y

My invention has for its object to improve the construction of this class of instruments, and in carrying my invention into effect I provide a beam with two heads, both of which tenth oI an inch apart or any other desired subdivision of a foot. In the accompanying drawings, illustrat- `ingmy improvement, like characters of refer- @tence designate corresponding parts in the 3o several v1ews,.in which- Figure 1 is a perspective view showing a beam having two heads mounted thereon.

Fig. 2 is a vertical longitudinal sectional.

view oi the same. Fi 3 is avertical sectional view of a modl ed .form of movable head mounted on a part of abeam of modiiied construction. Fig.` 4 is a perspective view of a securing-pin that is employed in'` connection with one of the heads shown in Fig. 1. Fig. 5 is a vertical transverse sectional view on the line :c :n of Fig. 2. Fig. 6 is a fragmentary view of art of the beam, showing the pin illustrate in Fig. 4 in position therein.

The beam 1 is a long .straight i'lat piece of metal,preierably steel, and this beam carries two heads 2 and 3, both of which are longitudinally movable on the beam, the head 3 being provided with a micrometer attachment 4, which is ofthe usual and well-known construction and need not be particularly described. f

The beam 1 is provided with a number of teeth 3, on one edge at one end thereof, and

apart, the distance between the points of the are movable on the beam, one being adapt! these teeth are located any desireddistance' ot 10 in` the head 3, and this thumb-screw bears upon the plate 6 and serves to force the plate firmly into contact' with the beam when itis desired to lock the head 3 thereon. The lower wall of the o ening 5 is formed with teeth l1, correspon ing to the teeth 3 on the A lower edge of the beam, these teeth 11 being normally in en a ement with the teeth 3 on ythe beam and oc red in mesh by the screw .9 when the head 3 has been located at the desired position.

The end ofthe beam 1 opposite the end which is furnished with the teeth 3 and upon which the head 2 is mounted is provided with a plurality'ol transverse openings 1212, these openings being of any desired number, depending on thelength of the beam, and located a foot from one another, if the foot is the unit of measurement ado `ted or a distance apart equal to whatever other unit of measurement may be adopted. The head 24 is formed with an openin 13, through which .the beam passes, an with openings 14 14 in its side dyvalls adapted to receive a pin 15, whichpinf` 1s formed with a head 16, the function 'of this pin being to lock the head 2 upon the beam,

the pin 15 passing` through one of the o enin s 12 when the lead 2 1s at'the desire position of adjustment. The openings 12 in: the beam are semicircular at their upper portions and V-shaped at their lower portions, theapex of the lower portion heilig formed with a small notch 17, as shown in Fig. 2, 'and while these openings re ister substantially with the openings 14 in t e head 2 the openings 12 are oi such height that a clearancespace 18 will be left above the top ofthe pin 15when the latteris passed through the openings 14 and one ofthe openings 12. he pin 15 is slightly tapered, as are also the openings 14 14 and the openings 12, and the pin in cross-section corresponds. substantially in shape tothe openings 12, being formed with a ico semicircular upper side 19 and two iiat sides 20 20, the pin being of the peculiar form shown in order to cause the same to center IIO exactlyv in the opening 12 in the beam and scribed manner operates as follows: Let it be i with the openings 14 14 in the head-2 and so as to cause the head 2 to seat at an exact point on the beam. The lower wall ofthe opening 13 in the head 2 is preferably cut away, as shown at 21 in Fig. 2, so as to ai'ford two bearing-surfaces 22 22 for the lower edge of the beam, and in the modified form shown in F ig. 3 of the drawings the head 2 which is substituted for the head 2, has teeth 24 on the lower` wall of the opening 13', through which the-beam1, which is substituted for the beam 1, passes, these teeth meshing with twosets of teeth 27 27, formed on the beam L', the sets of teeth 27 27' being repeated at intervals of a foot apart, so that the head 2 can be located on the beam at points a foot apart. The head 2 is locked on the beam at its adjusted positions by means of a thumbscrew 28, the head of which works in a slot 29 in the head 2.l The beam 1 is provided with a scale A, which is subdivided to correspond to the distance between the points of the teeth 3', the scale assisting-in the location of the head 3 at the desired points.

The device constructed in the above-desupposed, for instance, that it is desired to gage an object that is three feet two and one-tenth inches in length, the scale A being, it is supposed, subdivided into tenths; The head 2 is moved to a position where the openings 14 14 will coincide with the third hole to the left ofthe inner end ofthe teeth 3. The

Ypin 15 is then inserted inthe openings 14 14,

and passing through the opening 12 in the beam the hat sides of the pin bear on the flat sides of the V-shaped portion of the opening 12, and the pin being tapered the beam will be pressed firmly down upon the bearing-surface 22 and locked in position. screw 9 of the head 3 being loosened, this head is moved a distance of two and vone-tenth inches from the inner end of the scale A and then locked in position by turning the thumbscrew 9. The article to be gaged is inserted between the heads and the `minute subdivisions of an inch are ascertainedby means of the micrometer 4 in the usual manner. Where the modiiied form shown in Fig. 8 is employed, the head 2/ 2- is moved along the l beam by first 'loosening the thumb-screw 28 until the teeth 24 are out of mesh with the teeth 27 and then sliding the head along the beam until it is opposite the set of teeth at the desired distance from the teeth 3 and the head 3 is then adjusted inthe manner above described, the screw 28 being of course has been located at the desired point,v

Havingfully described my invention, what Iclaim, and desire to secure by Letters Patent, is-l l 1. In a gage, the combination of a beam having teeth on its edge, a head sliding o n the beam and having teeth adapted to engage the teeth on the beam, a spring-pressed plate mounted in the opening in the headv through which the beam passes', a thumb-screw carried by the head and bearing on said plate, a micrometer carried by said head, a. second head mounted on the beam and having openings in its side walls, the beam being provided with openings located at a fixed dis- `tance apart, said openings being V-shaped on one side, and a tapering pinadapted to pass through the openings inthe las`t-named head and the openings in the beam, said pin having sides corresponding in angle to the V- shaped sides ofthe openings in the beam.

2. vIn a device of the character described, the combination of a beam having teeth on one edge, a head having an opening therein to receivethe beam and having teeth meshing with the teeth on the beam, means for locking the teeth in the opening in mesh with the teeth on the beam, a second head slidably mounted on the beam, and a tapering pin having angular sides adapted to pass through openings formed in said head and through located at regular distances apart in the beam.

having teeth on its edge, a head having an opening to receive the beam and sliding on the beam and having' teeth on the lower wall of said opening adapted to engage` the teeth in the opening in the head through which the beam passes and a thumb-screw carried by the head and bearing on said plate.

In testimony whereof I aiiiX my signature x in the presence of two witnesses.

PETER LAYMAN.

1Witnesses IRA L. NASH,

J. M. COBB.

openings corresponding in shape to said pin of the beam, a spring-pressed plate mounted tightened up and locking, the head 2 when it A 3. In a gage, the combinationof a beam IOO 

